UVBRI filters have been the standard for photometric measurements for decades. They have evolved over time as technology changed. H. Johnson in the 1950s and A.W.J. Cousins in the 1970s designed these filters for photomultiplier tubes (PMT).

UVBRI filters have been the standard for photometric measurements for decades. They have evolved over time as technology changed. H. Johnson in the 1950s and A.W.J. Cousins in the 1970s designed these filters for photomultiplier tubes (PMT).

UVBRI filters have been the standard for photometric measurements for decades. They have evolved over time as technology changed. H. Johnson in the 1950s and A.W.J. Cousins in the 1970s designed these filters for photomultiplier tubes (PMT).

Astrodon Imaging offers products that simplify astrophotography. We began in 2002 to serve the interests of the CCD astronomical imaging community for both pretty picture imaging and scientific research. We strive to make the best performing products available. We shall invest in product improvement based upon feedback from our customers. We will be accessible and responsive to our customers and prospective customers. We will continue to innovate and bring new products to the imaging community that again, simplify astrophotography.